ccw_device_start_key - start a s390 channel program with key
2. SYNOPSIS ▲
int ccw_device_start_key(struct ccw_device * cdev , struct ccw1 * cpa , unsigned long intparm , __u8 lpm , __u8 key , unsigned long flags );
3. ARGUMENTS ▲
target ccw device
logical start address of channel program
user specific interruption parameter; will be presented back to cdevAqs interrupt handler. Allows a device driver to associate the interrupt with a particular I/O request.
defines the channel path to be used for a specific I/O request. A value of 0 will make cio use the opm.
storage key to be used for the I/O
additional flags; defines the action to be performed for I/O processing.
4. DESCRIPTION ▲
Start a S/390 channel program. When the interrupt arrives, the IRQ handler is called, either immediately, delayed (dev-end missing, or sense required) or never (no IRQ handler registered).
5. RETURNS ▲
0, if the operation was successful; -EBUSY, if the device is busy, or status pending; -EACCES, if no path specified in lpm is operational; -ENODEV, if the device is not operational.
6. CONTEXT ▲
Interrupts disabled, ccw device lock held
7. AUTHOR ▲
Cornelia Huck <>
8. COPYRIGHT ▲